Source: https://code.google.com/p/google-security-research/issues/detail?id=630
The attached file can cause an out-of-bounds read of an image. While the bits of the image are null, the width, height and other values can make it a valid pointer.
Proof of Concept:
https://github.com/offensive-security/exploit-database-bin-sploits/raw/master/sploits/39460.zip